Apparatus for heating tools.



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IIVVE/VTO? @fawzewj zfz'e PATENTED MAR. 14, 1905 J. PIRIE. APPARATUS FORHEATING TOOLS APPLICATION FILED SEPT. 2. 190a.

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PATENTBD MAR 14, 1905.

J. PIRIE. APPARATUS FOR HEATING TOOLS.

APPLICATION FILED SBPTJ, 1903.

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HVVENTOR fimeaz zlri ATTORNEYS UNITED STATES Patented March 14, 1905.

PATENT OFFICE.

JAMES PIRIE, OF MONTPELIER, VERMONT, ASSIGNOR TO PIRIE TOOL SHARPENINGMACHINE COMPANY, OF MONTPELIER, VERMONT.

APPARATUS FOR HEATING TOOLS.

SPECIFICATION forming part of Letters Patent No. 784,883, dated March14, 1905.

I Application filed September 2, 1903. Serial No. 171,644.

To all 11:72.01 it many concern:

Be it known thatl, JAMES PI1 .IE,a citizen of the United States, and aresident of Montpelier, in the county of Washington and State ofVermont, have invented a new and Improved Apparatus for Heating Tools,of which the following is a full, clear, and exact description.

The invention relates to apparatus for heating stone-cutters toolssuchas points,chisels, hammers,d rills,and the likeprior to sharpening thesame; and the object of the invention is to provide a new and improvedtool-heating apparatus which is simple and durable in construction andarranged to enable a single operator to heat a large number of tools ina comparatively short time.

The invention consists of novel features and parts and combinations ofthe same, as willbe more fully described hereinafter and then pointedout in the claims.

A practical embodiment of the invention is represented in theaccompanying drawings, forming a part of this specification, in whichsimilar characters of reference indicate corresponding parts in all theviews.

Figure 1 is a plan view of the improvement,

parts being in section. Fig. 2 is a side elevation of the improvement.Fig. 3 isvan enlarged plan View of part of the tool-carrier for carryingthe tools to the forge. Fig. 4 is a cross-section of the same. Fig. 5 isa crosssection of the improvement on the line 5 5 of Fig. 1.

' The forge A, preferably of the oil-burner type, is provided in itsfront upper portion with a longitudinal opening A for the passage of theupper run of an endless carrier B, employed for carrying the tool O tobe heated in such a manner that the cutting end of the tool passesthrough the forgeA for the latter to heat the said cutting edge, itbeing understood that the speed of the carrier B and the temperature inthe forge A are so regulated as to enable the operator to readilyperform the work described and to enable the operator to handle a verylarge number of tools in a comparatively short time.

The carrier B consists, preferably,of an endless link chain B, on whichare riveted or otherwise secured platforms B for supporting the tools O,and the said link chain B passes over sprocketwheels 1 and I, journalodin suitable bearings, and of which the sprocket-wheel 1 is driven by anoverhead driving-gear J, driven from the main shaft K by suitabledevices under the control of the operator to permit of increasing ordecreasing the speed of the endless carrier B, according tocircumstances.

For the purpose mentioned a lever J is arsaid platforms between the exitend of the I forge and the sprocket-wheel I.

The operator is protected from the heat of the forge by suitable apronsA hung on the forge-hood A connected with the chimney A for carrying offthe heat and gases. (See Fig. 5.) The heat in the forge is regulated bymeans under the control of the operator, and for this purpose suitableconnections are made with the valve Q, of the oil or gas supply pipe Qand with the valve R of the airsupply pipe R of the forge, so that theoperator by manipulating the said connections can increase or decreasethe fuel-supply for the forge, and thereby regulate the heat therein toinsure proper heating of the tools C.

The connections mentioned may be such as shown in Figs. 1 and 2that is,on the valvestems of the valves Q and R are secured sprocket-Wheels S S,connected by sprocketchains S S with sprocket-wheels S S on transverseshafts S journaled in suitable bearings attached to the forge A, and onthe said shafts are hand-wheels S S' within convenient reach of theoperator to enable the operator to turn the hand-wheels to open andclose the valves Q and R more or less to regulate the supply of the fuelto the forge, and thereby control the heat in the forge.

Having thus described my invention, 1 claim as new and desire to secureby Letters Patent- 1. An apparatus for heating tools, comprising a forgehaving a longitudinal opening in its front portion at the top thereof,an endless carrier for the tools havingits upper run passing through thesaid opening, the carrier being arranged to carry the points of thetools through the forge with the shanks in the open air, means forsupplying fuel to the forge to cause the heat to rush up at the innerface of the front wall and come in contact with the points of the toolsto heat the points only, and an apron or shield suspended from theforgehood and extending in front of said opening, and the upper run ofsaid carrier.

2. An apparatus for heating tools compris ing a forge having alongitudinal opening in its front portion at the top thereof, means for.

supplying fuel to said forge, the said opening at the top causing theheat to rush upward at the inner face of the front wall to said opening,an endless carrier having its upper run passing horizontally throughsaid opening above the upper face of the front wall and arranged tocarry tools with their cutting edges extending into the forge to be metby the upwardly-rushing heat from the forge, the top wall of the forgeforming the top of said opening and projecting but a short distancebeyond the inner face of the front wall to permit the heat to passupward over the inner edge of the carrier without coming in contact withthe shanks of the tools, as set forth.

3. In an apparatus for heating tools, a forge having a longitudinalopening in its front portion at the top thereof, means for supplyingfuel to said forge, the said opening at the top causing the heat to rushupward at the inner face of the front wall to said opening, an endlesscarrier for the tools having its upper run passing horizontally throughthe said opening above the upper face of the front wall of the forge andarranged to carry tools with their cutting edges extending into theforge to be met by the upwardly-rushing heat from the forge, the topwall of the forge forming the top of said opening and projecting but ashort distance beyond the inner face of the front wall to permit theheat to pass upward over the inner edge of the carrier, and means forregulating the speed of the said carrier, as set forth.

4. An apparatus for heating tools, comprising a forge having alongitudinal opening in its front portion at the top thereof, an endlesscarrier for the tools having a portion of its upper run passinghorizontally through the said opening in the forge to carry the toolsthrough the forge to heat their cutting edges, the said carriercomprising an endless link chain, platforms secured on the chain forsupporting the tools, sprocket wheels around which the chain passes andparallel supporting-bars extending horizontally between thesprocket-Wheels and on which the platforms ride, means for supplyingfuel and air to the lower part of the forge, means under the control ofthe operator for regulating the fuelsupply, and means for regulating thespeed of the carrier, as set forth.

5. An apparatus for heating tools prior to sharpening the same andcomprising a forge having a longitudinal opening in its front portion atthe top thereof, an endless carrier for the tools having its upper runpassing horizontally through the said opening in the forge to carry thetools through the upper part of the forge to heat the cutting edges ofthe same, the said carrier comprising an endless link chain, platformssecured on the chain for supporting the tools, sprocket-wheels aroundwhich the chain passes, parallel supportingbars extending horizontallybetween the sprocket-wheels and on which the platforms ride, means fordriving one of said sprocketwheels, and a shield suspended in front ofthe opening in the forge, as set forth.

6. An apparatus for heating tools comprising a forge having alongitudinal opening in its front portion at the top thereof, theopening at the top causing the heat from the fuel in the forge to rushupward at the inner face of the front wall to said opening, an endlesscarrier having its upper run passing horizontally through said openingabove the upper face of the front Wall and arranged to carry tools withtheir cutting edges extending into the forge to be met by theupwardly-rushing heat from the fuel, the forge-wall at the top of saidopening projecting over the inner edge only of the carrier to permit theheat to pass upward over the said inner edge of the carrier withoutcoming in contact with the shanks of the tools, and a shield arranged infront of the said opening and extending below the upper run of thecarrier at the outer side thereof, as set forth.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing witnesses.

JAMES PlRIE. WVitnesses:

CLYDE D. TEMPLETON, 'lnuo'rnr R. MERRILL.

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